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A Self-Report Risk Index to Predict Occurrence of Dementia in Three Independent Cohorts of Older Adults: The ANU-ADRI
Stockholm University, Faculty of Social Sciences, Aging Research Center (ARC), (together with KI).
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2014 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 9, no 1, e86141- p.Article in journal (Refereed) Published
Abstract [en]

Background and Aims: The Australian National University AD Risk Index (ANU-ADRI, is a self-report risk index developed using an evidence-based medicine approach to measure risk of Alzheimer's disease (AD). We aimed to evaluate the extent to which the ANU-ADRI can predict the risk of AD in older adults and to compare the ANU-ADRI to the dementia risk index developed from the Cardiovascular Risk Factors, Aging and Dementia (CAIDE) study for middle-aged cohorts. Methods: This study included three validation cohorts, i.e., the Rush Memory and Aging Study (MAP) (n = 903, age >= 53 years), the Kungsholmen Project (KP) (n = 905, age >= 75 years), and the Cardiovascular Health Cognition Study (CVHS) (n = 2496, age >= 65 years) that were each followed for dementia. Baseline data were collected on exposure to the 15 risk factors included in the ANU-ADRI of which MAP had 10, KP had 8 and CVHS had 9. Risk scores and C-statistics were computed for individual participants for the ANU-ADRI and the CAIDE index. Results: For the ANU-ADRI using available data, the MAP study c-statistic was 0.637 (95% CI 0.596-0.678), for the KP study it was 0.740 (0.712-0.768) and for the CVHS it was 0.733 (0.691-0.776) for predicting AD. When a common set of risk and protective factors were used c-statistics were 0.689 (95% CI 0.650-0.727), 0.666 (0.628-0.704) and 0.734 (0.707-0.761) for MAP, KP and CVHS respectively. Results for CAIDE ranged from c-statistics of 0.488 (0.427-0.554) to 0.595 (0.565-0.625). Conclusion: A composite risk score derived from the ANU-ADRI weights including 8-10 risk or protective factors is a valid, self-report tool to identify those at risk of AD and dementia. The accuracy can be further improved in studies including more risk factors and younger cohorts with long-term follow-up.

Place, publisher, year, edition, pages
2014. Vol. 9, no 1, e86141- p.
National Category
Gerontology, specializing in Medical and Health Sciences
URN: urn:nbn:se:su:diva-101243DOI: 10.1371/journal.pone.0086141ISI: 000330288000056OAI: diva2:703500
Swedish Research Council


Available from: 2014-03-07 Created: 2014-03-03 Last updated: 2015-02-17Bibliographically approved

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Gerontology, specializing in Medical and Health Sciences

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